A third day of an atmospheric river storm has inundated Northern California and the Bay Area, with the storm spreading from the North Bay south across the region, flooding creeks, roads, and low-lying areas.

More than a foot of rain is forecast in Northern California and southwest Oregon, likely causing life-threatening flash flooding and rock slides.

San Francisco was under a Flash Flood Warning Friday afternoon due to the heavy rain. Residents were urged not to travel as the severe weather continued. Some of San Francisco's streets are seeing flooding from the atmospheric river.